查看mysql中database佔用磁盤空間的大小SQL語句

1.選擇information_schema

use information_schema

2.查詢所有database佔用磁盤空間大小

select TABLE_SCHEMA, concat(truncate(sum(data_length)/1024/1024,2),' MB') as data_size,
concat(truncate(sum(index_length)/1024/1024,2),'MB') as index_size
from information_schema.tables
group by TABLE_SCHEMA
order by data_length desc;

3.查詢單個database佔用磁盤空間大小

select TABLE_NAME, concat(truncate(data_length/1024/1024,2),' MB') as data_size,
concat(truncate(index_length/1024/1024,2),' MB') as index_size
from information_schema.tables where TABLE_SCHEMA = '數據庫名稱'
group by TABLE_NAME
order by data_length desc;